Dinas species

Key to Dinas species of São Nicolau Island

1. Body length 7.2 to 9.3 mm ( Fig. 4A View Fig ). Epifrons with deep median longitudinal furrow in its whole length and reaching to the vertex or the occiput, and with transversal striae in males ( Fig. 2B View Fig ). Pronotum with large tubercles ( Fig. 2D View Fig ). Elytra subglobose; integument black covered sparsely with small circular scales ( Fig. 2H View Fig ). ............................................ ........................................................................................... Dinas (s. str.) strakai View in CoL sp. nov.

– Body length 3.6 to 6.0 mm ( Fig. 3A View Fig ). Epifrons with shallow median longitudinal furrow only in part of its length, and without any transversal striae in males ( Fig. 2A View Fig ). Pronotum punctate, not tuberculate ( Fig. 2C View Fig ). Elytra elongated and slightly oval; integument black (brown) covered densely with small circular to slightly oval scales ( Fig. 2G View Fig ). ............. 2

2. Elytra without stout, long, erect setae ( Fig. 3C View Fig ). ............................................................... ........................................................ Dinas ( Microspina) sitonaeformis Wollaston, 1867 View in CoL

– Elytra with distinct stout, long, erect setae at least in apical third of elytra ( Figs 3B, 3D View Fig ). ................................................................................................................................. 3

3. Stout, apically widened and flattened, long, erect setae on whole elytra ( Fig. 3D View Fig ). ......... .............................................................. Dinas ( Microspina) angusticeps Roudier, 1957

– Stout, apically pointed, not flattened, long, erect setae only on apical third of elytra ( Fig. 3B View Fig ). ....................................................................... Dinas ( Microspina) afonsoi View in CoL sp. nov.